Physics, asked by Micromax156, 1 year ago

a 100 meter long train moving with constant speed of 90 km/h crosses a tunnel of 300 m long. the time taken by the train to cross the tunnel completely is

Answers

Answered by geetacharan

i think answer is 16

geetacharan: or not

Micromax156: yes 16

geetacharan: 300+100=400

geetacharan: speed=distance /time

geetacharan: convert 90kmph into m/s

geetacharan: u get 25m/s

geetacharan: time=400/25

geetacharan: answer is 16

geetacharan: ok

Micromax156: kkk

Answered by phillipinestest

Given:

Length of train = 100m, speed $= 90Km/h = 90\times 1000 = 90000m/hr$

$= \frac {90000} {3600} = 25 m/sec$

Total distance to cross the tunnel completely by the train = length of tunnel + length of train

$= 300m + 100m = 400m$

$Timetaken=\frac { Distance }{ Speed }$

$=\frac { 400m }{ 25m/sec }$

= 16 seconds

Time taken to cross the tunnel completely = 16 seconds

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